From owner-freebsd-hackers Fri Jan 4 5:16:28 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from straylight.ringlet.net (discworld.nanolink.com [217.75.135.248]) by hub.freebsd.org (Postfix) with SMTP id 5D4E637B405 for <freebsd-hackers@freebsd.org>; Fri, 4 Jan 2002 05:16:21 -0800 (PST) Received: (qmail 1043 invoked by uid 1000); 4 Jan 2002 12:48:22 -0000 Date: Fri, 4 Jan 2002 14:48:22 +0200 From: Peter Pentchev <roam@ringlet.net> To: Martin Kaeske <Martin.Kaeske@II.Stud.TU-Ilmenau.DE> Cc: freebsd-hackers@freebsd.org Subject: Re: path_mtu_discovery Message-ID: <20020104144821.A328@straylight.oblivion.bg> Mail-Followup-To: Martin Kaeske <Martin.Kaeske@II.Stud.TU-Ilmenau.DE>, freebsd-hackers@freebsd.org References: <20020104110806.A2138@walnut.hh59.local> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20020104110806.A2138@walnut.hh59.local>; from Martin.Kaeske@II.Stud.TU-Ilmenau.DE on Fri, Jan 04, 2002 at 11:08:06AM +0100 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: <freebsd-hackers.FreeBSD.ORG> List-Archive: <http://docs.freebsd.org/mail/> (Web Archive) List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions) List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-hackers> List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-hackers> X-Loop: FreeBSD.ORG On Fri, Jan 04, 2002 at 11:08:06AM +0100, Martin Kaeske wrote: > Hello, > I'm using FreeBSD-4.4-STABLE and have an OpenBSD-2.9 router to > connect to the internet (via DSL). If i try to do a cvsup > (cvsup.de.freebsd.org, cvsup2.de.freebsd.org, cvsup.freebsd.org) > i'm getting a lot of "icmp: Destination unreachable, need to frag > <mtu 1488>" messages and cvsup fails (timeout). The curious thing > is if i disable net.inet.tcp.path_mtu_discovery or if i lower the > MTU to 1488, everything is fine (of course). > That's why i wanted to ask wether FreeBSD fails to lower the MTU > (it should lower it due to the icmp messages, shouldn't it?) or > is there any pppoe specific problem between me and the cvsup servers? > > Martin > PS: AFAICS cvsup is the only problem ftp/http/nntp works fine You have not, by any chance, firewalled ICMP replies, have you - either outgoing on the router, or incoming on the FreeBSD box? G'luck, Peter -- This sentence no verb. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message